diff --git a/backend/Dockerfile b/backend/Dockerfile
index 4575e55..581ca0d 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,57 +1,58 @@
+# syntax=docker/dockerfile:1
 # =============================================================================
 # GoHorse Jobs Backend - Ultra-Optimized Dockerfile
-# Target: < 20MB final image (scratch-based)
 # =============================================================================
-# syntax=docker/dockerfile:1
 
-# -----------------------------------------------------------------------------
-# Stage 1: Build (with cache mounts)
-# -----------------------------------------------------------------------------
+# Stage 1: Build
 FROM mirror.gcr.io/library/golang:1.24-alpine AS builder
 
+# Instala dependências necessárias para o build
+RUN apk add --no-cache git ca-certificates tzdata
+
 WORKDIR /build
 
-# Install build deps (minimal)
-RUN apk add --no-cache git ca-certificates tzdata
-
-# Cache go modules (separate layer for better caching)
+# 1. Cache de Módulos: Copia apenas os arquivos de definição primeiro
 COPY go.mod go.sum ./
-#RUN --mount=type=cache,target=/go/pkg/mod \
-#    go mod download && go mod verify
 
-# Copy source
+# 2. Download das dependências (Camada pesada que será cacheada)
+# Removi o comentário do mount e adicionei o download explícito
+RUN --mount=type=cache,target=/go/pkg/mod \
+    go mod download && go mod verify
+
+# 3. Copia o código fonte (só será executado se o código mudar)
 COPY cmd ./cmd
 COPY internal ./internal
 COPY migrations ./migrations
 COPY docs ./docs
 
-# Build with maximum optimizations:
-# - CGO_ENABLED=0: Pure Go binary (no C deps)
-# - ldflags -s -w: Strip debug info (-4MB)
-# - trimpath: Remove local paths
-# - -a: Rebuild all packages
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
+# 4. Build com Cache de Compilação
+# O uso de --mount=type=cache no /root/.cache/go-build acelera builds subsequentes
+RUN --mount=type=cache,target=/go/pkg/mod \
+    --mount=type=cache,target=/root/.cache/go-build \
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
     -ldflags="-s -w -X main.Version=$(git describe --tags --always 2>/dev/null || echo 'dev')" \
     -trimpath \
     -o /app/main ./cmd/api
 
 # -----------------------------------------------------------------------------
-# Stage 2: Production (scratch for minimal size)
+# Stage 2: Production (scratch)
 # -----------------------------------------------------------------------------
 FROM scratch AS runner
 
-# Copy essentials from builder
+# Copia informações de fuso horário e certificados SSL
 COPY --from=builder /usr/share/zoneinfo /usr/share/zoneinfo
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 
-# Copy binary and migrations
+# Copia o binário e as migrations
 COPY --from=builder /app/main /main
 COPY --from=builder /build/migrations /migrations
 
-# Environment
+# Configurações de execução
 ENV PORT=8521 \
-    TZ=America/Sao_Paulo
+    TZ=America/Sao_Paulo \
+    GODEBUG=netdns=go \
+    GOGC=50
 
 EXPOSE 8521
 
-ENTRYPOINT ["/main"]
+ENTRYPOINT ["/main"]
\ No newline at end of file